Cleanup doc reference of iree/samples/ --> samples/ (#8975)

Reflect https://github.com/google/iree/pull/8958
diff --git a/docs/developers/developing_iree/benchmarking.md b/docs/developers/developing_iree/benchmarking.md
index 49c8652..2a9a8dc 100644
--- a/docs/developers/developing_iree/benchmarking.md
+++ b/docs/developers/developing_iree/benchmarking.md
@@ -22,7 +22,7 @@
 $ bazel run //iree/tools:iree-compile -- \
   -iree-mlir-to-vm-bytecode-module \
   -iree-hal-target-backends=vmvx \
-  $PWD/iree/samples/models/simple_abs.mlir \
+  $PWD/samples/models/simple_abs.mlir \
   -o /tmp/module.fb
 ```
 
diff --git a/docs/developers/developing_iree/developer_overview.md b/docs/developers/developing_iree/developer_overview.md
index 439b3f5..0866fb8 100644
--- a/docs/developers/developing_iree/developer_overview.md
+++ b/docs/developers/developing_iree/developer_overview.md
@@ -100,7 +100,7 @@
 ```
 
 Custom passes may also be layered on top of `iree-opt`, see
-[iree/samples/custom_modules/dialect](https://github.com/google/iree/blob/main/iree/samples/custom_modules/dialect)
+[samples/iree_custom_modules/dialect](https://github.com/google/iree/blob/main/samples/iree_custom_modules/dialect)
 for a sample.
 
 ### iree-compile
@@ -113,7 +113,7 @@
 ```shell
 $ ../iree-build/iree/tools/iree-compile \
   -iree-hal-target-backends=vmvx \
-  $PWD/iree/samples/models/simple_abs.mlir \
+  $PWD/samples/models/simple_abs.mlir \
   -o /tmp/simple_abs_vmvx.vmfb
 ```
 
@@ -131,7 +131,7 @@
 for more information.
 
 Custom translations may also be layered on top of `iree-translate`, see
-[iree/samples/custom_modules/dialect](https://github.com/google/iree/blob/main/iree/samples/custom_modules/dialect)
+[samples/iree_custom_modules/dialect](https://github.com/google/iree/blob/main/samples/iree_custom_modules/dialect)
 for a sample.
 
 ### iree-run-module
@@ -185,11 +185,11 @@
 function as exported by default and running all of them.
 
 For example, to execute the contents of
-[iree/samples/models/simple_abs.mlir](https://github.com/google/iree/blob/main/iree/samples/models/simple_abs.mlir):
+[samples/models/simple_abs.mlir](https://github.com/google/iree/blob/main/samples/models/simple_abs.mlir):
 
 ```shell
 $ ../iree-build/iree/tools/iree-run-mlir \
-  $PWD/iree/samples/models/simple_abs.mlir \
+  $PWD/samples/models/simple_abs.mlir \
   -function-input="f32=-2" \
   -iree-hal-target-backends=vmvx
 ```